rdma_reg_msgs(3) — Linux manual page


RDMA_REG_MSGS(3)      Librdmacm Programmer's Manual     RDMA_REG_MSGS(3)

NAME         top

       rdma_reg_msgs - register data buffer(s) for sending or receiving

SYNOPSIS         top

       #include <rdma/rdma_verbs.h>

       struct ibv_mr * rdma_reg_msgs (struct rdma_cm_id *id, void *addr,
       size_t length);

ARGUMENTS         top

       id          A reference to a communication identifier where the
                   message buffer(s) will be used.

       addr        The address of the memory buffer(s) to register.

       length      The total length of the memory to register.

DESCRIPTION         top

       Registers an array of memory buffers used for sending and
       receiving messages or for RDMA operations.  Memory buffers
       registered using rdma_reg_msgs may be posted to an rdma_cm_id
       using rdma_post_send or rdma_post_recv, or specified as the
       target of an RDMA read operation or the source of an RDMA write

RETURN VALUE         top

       Returns a reference to the registered memory region on success,
       or NULL on error.  If an error occurs, errno will be set to
       indicate the failure reason.

NOTES         top

       rdma_reg_msgs is used to register an array of data buffers that
       will be used send and/or receive messages on a queue pair
       associated with an rdma_cm_id.  The memory buffer is registered
       with the proteection domain associated with the idenfier.  The
       start of the data buffer array is specified through the addr
       parameter, and the total size of the array is given by length.

       All data buffers should be registered before being posted as a
       work request.  Users must deregister all registered memory by
       calling rdma_dereg_mr.

SEE ALSO         top

       rdma_cm(7), rdma_create_id(3), rdma_create_ep(3),
       rdma_reg_read(3), rdma_reg_write(3), ibv_reg_mr(3),
       ibv_dereg_mr(3), rdma_post_send(3), rdma_post_recv(3),
       rdma_post_read(3), rdma_post_readv(3), rdma_post_write(3),

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-08-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

librdmacm                      2010-07-19               RDMA_REG_MSGS(3)

Pages that refer to this page: rdma_dereg_mr(3)rdma_post_read(3)rdma_post_readv(3)rdma_post_ud_send(3)rdma_post_write(3)rdma_post_writev(3)rdma_reg_read(3)rdma_reg_write(3)rdma_cm(7)